static InnerAccessUnit insertDecodingTime(InnerAccessUnit current, InnerAccessUnit previous) {
int DeltaTfiDivisorIdx;
if (!current.sliceHeaders.get(0).sps.vuiParams.pic_struct_present_flag) {
DeltaTfiDivisorIdx = 1 + (1 - (!current.sliceHeaders.get(0).field_pic_flag ? 0 : 1));
} else {
throw new UnsupportedOperationException("Hmm I cannot deal with picTimingSei");
// get details here
// D.1.2 Picture timing SEI message syntax
/*SEI.SEIMessage picTimingSei = null;
for (SEI.SEIMessage message : current.sei.messages) {
if (message.payloadType == 1) {
picTimingSei = message;
}
}
if (picTimingSei != null) {
if (!avc.sei.pic_timing.pic_struct)
DeltaTfiDivisorIdx = 2;
else if (avc.sei.pic_timing.pic_struct == 8)
DeltaTfiDivisorIdx = 6;
else
DeltaTfiDivisorIdx = (avc.sei.pic_timing.pic_struct + 1) / 2;
} */
}
current.decodingTime =
previous.decodingTime
+ 2 * current.sliceHeaders.get(0).sps.vuiParams.num_units_in_tick * DeltaTfiDivisorIdx;
// System.err.print("FPS: " + 2 * current.sliceHeaders.get(0).sps.vuiParams.time_scale);
return current;
}
static InnerAccessUnit decodePocType0(InnerAccessUnit current, InnerAccessUnit prev) {
int TopFieldOrderCnt = Integer.MAX_VALUE;
int BottomFieldOrderCnt = Integer.MAX_VALUE;
int prevPicOrderCntMsb;
int prevPicOrderCntLsb;
if (current.sliceHeaders.get(0).slice_type == SliceType.I
|| current.sliceHeaders.get(0).slice_type == SliceType.SI) {
prevPicOrderCntMsb = 0;
prevPicOrderCntLsb = 0;
} else {
// if memory management dunno
if (current.sei != null) {
for (SEI.SEIMessage message : current.sei.messages) {
if (message.payloadType == SEI.PIC_TIMING) {
throw new RuntimeException("That needs to be implemented. 7687526897568234.");
}
}
}
prevPicOrderCntMsb = prev.picOrderCntMsb;
prevPicOrderCntLsb = prev.sliceHeaders.get(0).pic_order_cnt_lsb;
}
int MaxPicOrderCntLsb =
1 << (current.sliceHeaders.get(0).sps.log2_max_pic_order_cnt_lsb_minus4 + 4);
int picOrderCntMsb;
if ((current.sliceHeaders.get(0).pic_order_cnt_lsb < prevPicOrderCntLsb)
&& ((prevPicOrderCntLsb - current.sliceHeaders.get(0).pic_order_cnt_lsb)
>= (MaxPicOrderCntLsb / 2))) {
picOrderCntMsb = prevPicOrderCntMsb + MaxPicOrderCntLsb;
} else if ((current.sliceHeaders.get(0).pic_order_cnt_lsb > prevPicOrderCntLsb)
&& ((current.sliceHeaders.get(0).pic_order_cnt_lsb - prevPicOrderCntLsb)
> (MaxPicOrderCntLsb / 2))) {
picOrderCntMsb = prevPicOrderCntMsb - MaxPicOrderCntLsb;
} else {
picOrderCntMsb = prevPicOrderCntMsb;
}
if (!current.sliceHeaders.get(0).bottom_field_flag) {
TopFieldOrderCnt = picOrderCntMsb + current.sliceHeaders.get(0).pic_order_cnt_lsb;
}
if (current.sliceHeaders.get(0).bottom_field_flag) {
if (!current.sliceHeaders.get(0).field_pic_flag) {
BottomFieldOrderCnt =
TopFieldOrderCnt + current.sliceHeaders.get(0).delta_pic_order_cnt_bottom;
} else {
BottomFieldOrderCnt = picOrderCntMsb + current.sliceHeaders.get(0).pic_order_cnt_lsb;
}
}
if (current.sliceHeaders.get(0).sps.frame_mbs_only_flag
|| !current.sliceHeaders.get(0).field_pic_flag)
current.poc = Math.min(TopFieldOrderCnt, BottomFieldOrderCnt);
else if (current.sliceHeaders.get(0).bottom_field_flag) current.poc = BottomFieldOrderCnt;
else current.poc = TopFieldOrderCnt;
// System.err.println("poc : " + current.poc);
// System.err.println("poc-diff: " + (current.poc - prev.poc));
return current;
}